Amethyst, a variety of quartz with a vivid purple color, is the birthstone for February. Purple is a highly sought color for ...

It seems like a science fiction MacGuffin: it uses a purple diamond in a quartz tube exposed to an intense magnetic field. The system creates a maser, the microwave equivalent of a laser.

Dropship Women Fashion Watches Quartz Wristwatch Purple Mesh Belt. 7 High End Purple Dial Timepieces Watch Advice. Royal ...